Q#1: A SOP expression is equal to 1 when:
(A) All the variables in domain of expression are present
(B) At least one variable in domain of expression is present
(C) When one or more product terms in the expression are equal to 0
(D) When one or more product terms in the expression are equal to 1
Answer: (D) When one or more product terms in the expression are equal to 1
Q#2: The output A < B is set to 1 when the input combination is:
(A) A=10, B=01
(B) A=11, B=01
(C) A=01, B=01
(D) A=01, B=10
Answer: (D) A=01, B=10
Q#3: Two 2-bit comparator circuits can be connected to form a single 4-bit comparator:
(A) True
(B) False
Answer: (A) True
Q#4: High level Noise Margin (VNH) of CMOS 5 volt series circuits is:
(A) 0.3 V
(B) 0.5 V
(C) 0.9 V
(D) 3.3 V
Answer: (C) 0.9 V
Q#5: If we multiply “723” and “34” in floating point notation, the value of mantissa of result will be:
(A) 24.582
(B) 2.4582
(C) 24582
(D) 0.24582
Answer: (B) 2.4582
Q#6: The output of the expression F = A + B + C (OR operation) when A=0, B=1, C=1 is:
(A) Undefined
(B) One
(C) Zero
(D) 10 (binary)
Answer: (B) One
Q#7: If an active-HIGH S-R latch has S=0, R=1 and then R input goes to 0, the latch will be:
(A) SET
(B) RESET
(C) Clear
(D) Invalid
Answer: (A) SET
Q#8: 3.3 V CMOS series is characterized by __________ compared to the 5 V CMOS series:
(A) Low switching speeds, high power dissipation
(B) Fast switching speeds, high power dissipation
(C) Fast switching speeds, very low power dissipation
(D) Low switching speeds, very low power dissipation
Answer: (C) Fast switching speeds, very low power dissipation
Q#9: The binary value “1010110” is equivalent to decimal:
(A) 86
(B) 87
(C) 88
(D) 89
Answer: (A) 86
Q#10: The Encoder used as a keypad encoder is:
(A) 2-to-8 encoder
(B) 4-to-16 encoder
(C) BCD-to-Decimal
(D) Decimal-to-BCD Priority
Answer: (D) Decimal-to-BCD Priority
Q#11: How many data select lines are required for selecting eight inputs?
(A) 1
(B) 2
(C) 3
(D) 4
Answer: (C) 3
Q#12: The diagram with OR, AND, and NOT gates shows the general implementation of:
(A) Boolean
(B) Arbitrary
(C) POS
(D) SOP
Answer: (D) SOP
Q#13: The Quad Multiplexer has outputs:
(A) 4
(B) 8
(C) 12
(D) 16
Answer: (A) 4
Q#14: Demultiplexer has:
(A) Single input and single outputs
(B) Multiple inputs and multiple outputs
(C) Single input and multiple outputs
(D) Multiple inputs and single output
Answer: (C) Single input and multiple outputs
Q#15: The expression AB = BA is an example of:
(A) AB + C = A + BC
(B) A(B + C) = B(A + C)
(C) AB = BA
(D) A + B = B + A
Answer: (C) AB = BA
Q#16: “Sum-of-Weights” method is used:
(A) To convert from one number system to other
(B) To encode data
(C) To decode data
(D) To convert from serial to parallel data
Answer: (A) To convert from one number system to other